<template>
  <el-container class="home">
    <!-- 页面的头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面的主体部分 -->
    <el-container>
      <!-- 页面的左侧边栏 -->
      <el-aside :width="isCollapse ? '64px':'200px'">
        <div class="toggle_button" @click="toggle">|||</div>
        <!-- 侧边栏菜单区 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menusList" :key="item.id">
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{  item.authName  }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="`/${it.path}`" v-for="it in item.children" :key="it.id" @click="savePath(`/${it.path}`)">
              <template slot="title">
              <i class="el-icon-menu"></i>
              <span>{{  it.authName  }}</span>
            </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 页面的主区域 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  props: {},
  data () {
    return {
      menusList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 保存激活的连接地址
      activePath: ''
    }
  },
  methods: {
    logout () {
      // 清空token
      window.sessionStorage.removeItem('token')
      // 重定向到登录页
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuslist () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(this.meta.msg)
      this.menusList = res.data
    },
    // 点击按钮控制菜单的折叠与展开
    toggle () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    savePath (v) {
      window.sessionStorage.setItem('activePath', v)
      this.activePath = v
    }
  },
  components: {},
  created () {
    this.getMenuslist()
    this.activePath = window.sessionStorage.getItem('activePath')
  }
}
</script>

<style scoped lang="scss">
.home {
  height: 100%;
}
.el-menu{
  border-right: none;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 0;
  color: #fff;
  font-size: 20px;
  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle_button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  color: #fff;
  text-align: center;
  cursor: pointer;
  letter-spacing: .2em;
}
</style>
